According
to the ratio between composite materials and structural weight, which
of the following used most composite materials? ____.
A: F-22
B: A380
C: A400M
D: B787
to the ratio between composite materials and structural weight, which
of the following used most composite materials? ____.
A: F-22
B: A380
C: A400M
D: B787
举一反三
- According to source, composite materials divided into: （） A: conductive composite materials B: natural composite materials C: artificial composite materials D: damping composites
- The<br/>safety coefficient of the capacity of composite materials is usually<br/>____ times of metal materials. A: 0.8-0.9 B: 1.0-1.25 C: 1.15-1.2 D: 1.5-2.0
- Building materials may be classified into three groups according to the purposes they are used for: structural materials, decoration materials and some special materials.
- During<br/>the development and application of the composite materials, we should<br/>put ____ as the top priority. A: Designability B: Safety C: Adaptability D: Cost-effective
- 1-4.Strictly<br/>speaking, structural materials are also a type of functional<br/>materials, which belong to a large category of mechanical functional<br/>types. ()